Abstarct: A concentration of greenhouse gases and specifically carbon dioxide in the atmosphere is gradually increased during the past centuries and has caused a rise in global temperatures and climate changes. Role of agricultural ecosystems in increasing or reducing greenhouse gases has been considered in recent decades. Agricultural ecosystems are able to sequestrate part of the extra atmospheric carbon dioxide. The carbon sequestration is an operation that transfers atmospheric carbon dioxide to long-term reservoirs So that not immediately returned to the atmosphere. The amount of carbon entered to the soil is one of the most important determining factors to estimate changes in soil carbon and carbon sequestration potential. This experiment conducted to evaluate the effects of agricultural management in field under wheat cultivation on the carbon input at the province of North Khorasan. Plant and soil sampling of Irrigated and dry land wheat fields was conducted in the two sites of Sisab and Shagheh in 2013. This experiment baxsed on a completely randomized design with three replications For soil samples and a split-plot design in time was done For plant samples. The results showed that agricultural management had significant effects on nitrogen, organic carbon and soil carbon sequestration as well as phosphorus, and carbon sequestration plant's dry weight. These results suggested that the use of chemical fertilizers decreased the activity of the microorganisms and soil respiration. Also the use of manure could affect plant growth and increased soil carbon and its sequestration. Optimal management of farm lands can prevent the loss of soil organic carbon and also release carbon dioxide. If the agricultural management led to increase plant biomass, it can cause a rapid increase in plant carbon resources as well as a gradual increase in soil carbon. It seems the management crop factor had important role in enhancing carbon sequestration in soil.